DOS 2020

DOS Kongressen 2020 · 173 Can good outcomes be achieved with fixed bearing lateral UKA when using a strict strategy for usage? Anders Troelsen, Mette Mikkelsen, Kirill Gromov Dept. of Orthopaedic Surgery, Copenhagen University Hospital Hvidovre Background: There is solid evidence that medial unikompartmental knee ar- throplasty (UKA) offers benefits over total knee replacement in eligible patients without compromising revision rates when using contemporary indications and techniques. While there has been an increasing adoption of UKA in Denmark with a usage rate of almost 20 %, lateral UKA is used in <1% of knee replace- ments, despite isolated lateral compartment OA accounting for app. 10 % of OA cases. It can be speculated that such low utilization is due to sparse literature regarding its potentially good outcome, inferior survival reported in registries, and the lack of a strict strategy for adoption. Purpose / Aim of Study: To show the feasibility of adopting fixed bearing lat- eral UKA as part of an overall surgical knee arthroplasty strategy with optimized UKA utilization we report the outcome of the first 41 cases. Materials and Methods: We included all consecutive patients operated with fixed bearing lateral UKA at one department since the start of introduction in October 2016. It was an overall strategy to offer UKA whenever possible. All patients were operated in a well described fast-track setup. Data was collected prospectively in the departments arthroplasty database and included demo- graphic, patient reported outcomes measured as Oxford Knee Score (OKS) and Forgotten Joint Score (FJS) and reoperation data. Follow-up data at 3 months and 1 year are presented. Findings / Results: 41 cases were included. Mean age was 67 years and 75% were female. Median length of stay was 1 day. Mean (SD) preoperative OKS was 24 (7) and increased to mean 35 (6) and 42 (5) at 3- and 12- months follow-up respectively. Mean (SD) FJS was 48 (22) and 72 (19) at 3- and 12-months follow-up respectively. One knee was reoperated with repeated DAIR and was infection free at last follow- up. Conclusions: The adoption of fixed bearing lateral UKA can be successful with good clinical outcomes similar to that reported for medial UKA. Maintaining a strict strategy for adoption in an environment with optimized UKA utilization is probably fundamental to the results. 152.